package com.warrant.module.rpa.finance.util;

import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;

import com.warrant.module.rpa.finance.model.CollectionBill;

import javax.servlet.http.HttpServletResponse;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;

/**
 * Excel导入导出工具类
 */

public class ExcelUtils {

	/**
	 * excel 导出
	 * 
	 * @param list
	 *            数据列表
	 * @param fileName
	 *            导出时的excel名称
	 * @param response
	 */
	public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
		defaultExport(list, fileName, response);
	}

	/**
	 * 默认的 excel 导出
	 * 
	 * @param list
	 *            数据列表
	 * @param fileName
	 *            导出时的excel名称
	 * @param response
	 */
	private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) throws IOException {
		// 把数据添加到excel表格中
		Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
		downLoadExcel(fileName, response, workbook);
	}

	/**
	 * excel 导出
	 * 
	 * @param list
	 *            数据列表
	 * @param pojoClass
	 *            pojo类型
	 * @param fileName
	 *            导出时的excel名称
	 * @param response
	 * @param exportParams
	 *            导出参数（标题、sheet名称、是否创建表头，表格类型）
	 */
	private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) throws IOException {
		// 把数据添加到excel表格中
		Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
		downLoadExcel(fileName, response, workbook);
	}

	/**
	 * excel 导出
	 * 
	 * @param list
	 *            数据列表
	 * @param pojoClass
	 *            pojo类型
	 * @param fileName
	 *            导出时的excel名称
	 * @param exportParams
	 *            导出参数（标题、sheet名称、是否创建表头，表格类型）
	 * @param response
	 */
	public static void exportExcel(List<?> list, Class<?> pojoClass, String fileName, ExportParams exportParams, HttpServletResponse response) throws IOException {
		defaultExport(list, pojoClass, fileName, response, exportParams);
	}

	/**
	 * excel 导出
	 * 
	 * @param list
	 *            数据列表
	 * @param title
	 *            表格内数据标题
	 * @param sheetName
	 *            sheet名称
	 * @param pojoClass
	 *            pojo类型
	 * @param fileName
	 *            导出时的excel名称
	 * @param response
	 */
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response) throws IOException {
		defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName, ExcelType.XSSF));
	}

	/**
	 * excel 导出
	 * 
	 * @param list
	 *            数据列表
	 * @param title
	 *            表格内数据标题
	 * @param sheetName
	 *            sheet名称
	 * @param pojoClass
	 *            pojo类型
	 * @param fileName
	 *            导出时的excel名称
	 * @param isCreateHeader
	 *            是否创建表头
	 * @param response
	 */
	public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) throws IOException {
		ExportParams exportParams = new ExportParams(title, sheetName, ExcelType.XSSF);
		exportParams.setCreateHeadRows(isCreateHeader);
		defaultExport(list, pojoClass, fileName, response, exportParams);
	}

	/**
	 * excel下载
	 * 
	 * @param fileName
	 *            下载时的文件名称
	 * @param response
	 * @param workbook
	 *            excel数据
	 */
	private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {
		try {
			response.setCharacterEncoding("UTF-8");
			response.setHeader("content-Type", "application/vnd.ms-excel");
			response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLSX.getValue(), "UTF-8"));
			workbook.write(response.getOutputStream());
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}

	/**
	 * excel 导入
	 * 
	 * @param filePath
	 *            excel文件路径
	 * @param titleRows
	 *            表格内数据标题行
	 * @param headerRows
	 *            表头行
	 * @param pojoClass
	 *            pojo类型
	 * @param <T>
	 * @return
	 */
	public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
		if (StringUtils.isBlank(filePath)) {
			return null;
		}
		ImportParams params = new ImportParams();
		// params.setTitleRows(titleRows);
		// params.setHeadRows(headerRows);
		// params.setNeedSave(true);
		// params.setSaveUrl("/excel/");

		return ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
	}

	/**
	 * excel 导入
	 * 
	 * @param inputStream
	 *            文件输入流
	 * @param titleRows
	 *            表格内数据标题行
	 * @param headerRows
	 *            表头行
	 * @param needVerfiy
	 *            是否检验excel内容
	 * @param pojoClass
	 *            pojo类型
	 * @param <T>
	 * @return
	 */
	public static <T> List<T> importExcel(InputStream inputStream, Integer titleRows, Integer headerRows, boolean needVerfiy, Class<T> pojoClass) throws IOException {
		if (inputStream == null) {
			return null;
		}
		ImportParams params = new ImportParams();
		params.setTitleRows(titleRows);
		params.setHeadRows(headerRows);
		params.setSaveUrl("/excel/");
		params.setNeedSave(true);
		params.setNeedVerfiy(needVerfiy);
		try {
			return ExcelImportUtil.importExcel(inputStream, pojoClass, params);
		} catch (NoSuchElementException e) {
			throw new IOException("excel文件不能为空");
		} catch (Exception e) {
			throw new IOException(e.getMessage());
		}
	}

	/**
	 * Excel 类型枚举
	 */
	enum ExcelTypeEnum {
		XLS("xls"), XLSX("xlsx");
		private String value;

		ExcelTypeEnum(String value) {
			this.value = value;
		}

		public String getValue() {
			return value;
		}

		public void setValue(String value) {
			this.value = value;
		}
	}

	public static void main(String[] args) {
		ImportParams params = new ImportParams();
		params.setTitleRows(1);
		params.setHeadRows(1);
		List<CollectionBill> list = ExcelImportUtil.importExcel(new File("C:\\Users\\Administrator\\Desktop\\收款机器人\\建安信进账信息测试.xlsx"), CollectionBill.class, params);
		System.out.println(list);
	}
}